<template>
<div>
<div class="search">
    <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音" />
</div>
<div class="search-content" 
ref = "search"
v-show = "keyword"
>
    <ul>
        <li class="search-item border-bottom" 
        v-for="item of list" 
        :key="item.id"
        @click="handleCityClick(item.name)"
        >
            {{item.name}}
        </li>
        <li class="search-item border-bottom"
        v-show="hasNoData"
        >
            没有找到匹配数据
        </li>
    </ul>
</div>
</div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
    name:'CitySearch',
    props: {
        cities : Object
    },
    data () {
        return {
            keyword : '',
            list : [],
            timer : null
        }
    },
    computed: {
        hasNoData () {
            return !this.list.length
        }
    },
    watch: {
        keyword () {
            if (this.timer) {
                clearTimeout(this.timer)
            }
            if (!this.keyword) {
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities) {
                    this.cities[i].forEach((value) =>{
                        if (value.spell.indexOf(this.keyword) > -1 ||
                        value.name.indexOf(this.keyword) > -1) {
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
    methods: {
        handleCityClick(city){
        this.changeCity(city)
        this.$router.push('/')
        },
        ...mapMutations([
            'changeCity'
        ])
    },
    mounted () {
        this.scroll = new BScroll(this.$refs.search)
    }
}
</script>

<style lang='stylus' scoped>
@import '~styles/varibles.styl'
    .search
        height :.72rem
        padding :0 .1rem
        background :$bgColor
        .search-input
            box-sizing :border-box
            width :100%
            height :.62rem
            padding :0 .1rem
            line-height :.62rem
            text-align :center
            border-radius :.06rem
            color :#666
    .search-content
        z-index :1
        position :absolute
        top :1.58rem
        left :0
        right :0
        bottom :0
        background :#eee
        .search-item
            line-height :.62rem
            padding-left :.2rem
            background :#fff
            color :#666
</style>